1421381866 has 16 divisors (see below), whose sum is σ = 2258283456. Its totient is φ = 668650176.

The previous prime is 1421381851. The next prime is 1421381867. The reversal of 1421381866 is 6681831241.

It is a super-3 number, since 3×1421381866³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421381867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125365 + ... + 136231.

It is an arithmetic number, because the mean of its divisors is an integer number (141142716).

Almost surely, 2^1421381866 is an apocalyptic number.

1421381866 is a deficient number, since it is larger than the sum of its proper divisors (836901590).

1421381866 is a wasteful number, since it uses less digits than its factorization.

1421381866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14733.

The product of its digits is 55296, while the sum is 40.

The square root of 1421381866 is about 37701.2183622758. The cubic root of 1421381866 is about 1124.3553484643.

The spelling of 1421381866 in words is "one billion, four hundred twenty-one million, three hundred eighty-one thousand, eight hundred sixty-six".